Furnace for roasting ores.



J. B. F. HERRESHOPF. FURNACE FOR ROASTING onn's. APPLIOATION FILED AUG.11, 1910.

1,066,110, Patented July 1, 1913.

3 SHEETS-SHEET 2.

III/I l ll WITNESSES. INVENTU/i' JOHN B. fTl/EFIPES/IUF g /yamm ATTORNEYS J. B. F. HERRBSHOPF.

FURNACE FOR ROASTING ORES.

APPLICATION FILED AUG.11,1910.

Patented July 1, 1913.

3 SHEETS-SHEET 3.

INVE/VTUR (/Of/IVB f1 HfFFfS/iflff' m BALE/LEM ATTORNEYS WITNESSES:

may be UNITED STATES PATENT OFFICE.

JOHN B. F. HERRESHOFF, OF NEW YORK, N. Y., ASSIGNOR TO NICHOLS COPPER 00., OF NEW YORK, N. Y A CORPORATION OF NEW YORK.

FURNACE FOR ROASTING ORES.

1.01am 1o.

Specification of Letters Patent.

Patented J lily 1, 191-3.

' Application filed August 11, 1910. Serial No. 576,667.

T 0 all IF/LON: it you concern Be itkuoun that I, .lonx I). F. Hnnnnsuorr. a citizen otthe United States, and resident of the borough of Manhattan, city, county, and Flale of New York have invented. certain new and useful Improve ments in Furnaces tor Roasting Ores, of which the following is a specification.

My invention relates to ore roasting'furnaces ot the kind disclosed in my pending application Serial No. 508,508, tiled July 20,

1.909, and has. for its object to improve the construction of the rabble arms thereof and the means for fastening said arms in position in the furnace.

The particular object of ny invention is to so construct the rabble arms and cooperating idual-l v and quickly removed from the furnace and as quickly and easily replaced in position therein.

The present constrlictions are improvements of the structure shown in my previous United States Patent. X0. (116,926, issued January 3, 1899, and a re particularly adapted for use in tftlllllt' tltill with furnaces inthe usual shaft and sleeve at a point above one pair of rabble arms: Fig. 2 is a vertical section thereof on the line i --2 of Fig. 1; Fig. 3 is a. cross section on the line 3 3 of Fig. 1; Fig. 4. is a View similar to Fig. of another form ot my inv ntion: Figs. 5 and (i are sectiohal views thereof respectively on the lines '5- and (3-43 of Fig. 4: Fig. 7 a view similar to Figs. 1 and 4 of still another f rm ormy improvement and Fig. 8 a sectional view thereof on the line 88 of Fig. 7.

Tn Figs. 1.; 2 and 3 ob the drawings 10 represents the customanv holl w vertical shaft which extends ccntrallv of the furnace and is closed at; its upper end while its lower open end is conne ted with a source of air supply as a blower or other suitable device. A sleeve 11 also of any ordinary construc- .of' the furnace that said armstion-surrounds said shaft and is rigidly connected therewith, its lower end being closed and its upper open end extending to a point outside of the. urnaee. The said shaft and sleeve are given a rotary motion through the medium of suitable gearing for instance of the kind disclosed in my application Serial No. 508,598 above referred to. In this form of my invention the shaft 10 is provid d at; spaced intervals throughout its length with diametrically opposite sockets l! the walls of which convcr e toward the axis of the shaft. These sockets-12 which communicate with the interior of the shaft are preferably formed by bending the shaft material inward as shown in Fig. 1 and are provided adjacent to their inner edges with cylindrical bearing surfaces 13. Each socket 12 is further formed with a reccss' 14.10- cated at a suitable point on each of the surfaces 13 and extending parallel-therewith and at substantially right angles to the axis of the shaft. These recesses 14 each serve. to ermit of the passage of a projection 15 carried by each rabble arm '16 at the extremc inner end thereof which projections engage the inner wall of said sockets and prevent lengthwise movcment of the rabble"- tioo-z of the bearing surfaces 13 'to prevent lengthwise movement of the rabble arms in an inward direction. ln other words the projection 15 and lugs 19 are located at 0pposite sides of the bearing surface 17 of each arm and engage opposite surfaccsef the bearing portion 13 of each socket when the arms are in proper position in the furonce and thus maintain each arm again t any movement in the direction of its length. It is to be iunlerstood that the individual rabble arms each extend through openings 11 located in the sleeve 11 at points in registry with the sockets 12. Each rabble arm Y 16 is-a'lso divided internally by'a partition i a coming overheated. The air is introduced- 20 into two lengtl'nvise channels 21*and'22, which communicate with each other adjacent to the outer ends of the rabble arms The inner eiid of thechannel21 connects with applied to the interior of the shaft- 10 by" the blower or similar device and travels upwardly through said shaft and through the various channels 21 of the rabble arms .to the channels 22 thereof and finally escapes through the sleeve 11. In its pasage the air or, other gas cools theshaft'and the rabblearms and prevents same from beinto the shaft 10 under a slightly greater pressure than the pressureinside of the furnace so that any slight leakagewhich may occur at the points of connection of the arms and the; sleeve andshaftwill be into the furnace and n'otfrom the furnace into the sleeve 01'; shaft. The-hot air or gases of the furnace are thus prevented from entering the sleeveand shaft and'heating the" cooling mediumand its usefulness If it is desired for any reason to remove one-or more rabble arms, the same may be accomplished in the following manner: The

thus tending to destroy arm. which vit. is intended to disconnect is given a rotary movement/about its axis until the projection 15' is in registry with the recess 14 whereupon by alinear movement in the direction of thelength of the arm, said arm may be readily withdrawn from' its socket 12 and through the opening 11 which registers therewith. T c return or replace the arm or a substitute'in operative position the tapered end 18 thereof is inserted through the opening 11 and the projection *15' again brought into re istry with the recess 14.

After this has Keen accomplished the arm is given .a further'inwsrd movement to cause the projection 15 to pass through the recess after which the arm is given a rotary movement about itsaxis in adirection opposite to that in which it is rotated to remove said 7 arm. This rotary locking movement of the arm is'limite'd by means-0f a stop 2% fixed on theinside surfacd of each socket at a proper point and adapted to contact with the pro iection 15 as clearly indicated in Fig. The recesses 14,'projection l5 and stops 2% are. so located relatively to each other that when the arm is brought to its fihal position the teeth or projections 23 will stand upright in proper working position, The inward movement of each rabble arm is limited by means of the lugs 19 which abut against the outside surface of the bearing portion '13. During the rotary movement 'ofthe arms in either direction the portions 13 and the surface of the openings 11 serve as hearings to render this rotary vmovement of the arms rcadily'possible. 7

1n the form of construction shown in Figsg l; .5 and 6 the. shaft 10 is provided with sockets 12 similar .to the sockets12 shown in Figs. 1,2 and} and having bearing surfaces 13 similar to the bearing surfaces 13 arranged to cotiperate with-bearing surfaces 17 one of which is located at the inner end of each rabble arm 16 in .the same manner as shown in Fig. 1. Each. arm in addition to having a tapered portion 18" corresponding to the portion 18 of Fig. 1 is provided with an additional inclined portion 18 adapted to engage the similarlyvinclined surface 11 of the openings 11 which corre 90 spond to the openings 1110f Fig. 1; In this instance instead of having a recess on the sockets adjacent to the bearing portion as in Fig. 1 two or more recesses-1,4 are'provided in the sleeve 11 adjacent to the periphery of the openings 11 for the accommodation of two or more projections 15,. located on the struction and operation of-this form of my invention may be the same as in the structure illustrated inFigs. 1, 2 and 3. Tore-.- move' an arm in this form the said'arih is rotated until the projections 15f register with the recesses 14 afterwhich the said 1 arm may be taken' out by a simple length Wise movement thereof. To replace the arm orits substitute in position the inner end thereof is first passed throughthe respective I opening 11, the projections- 15 being 15 brought into registry with the recesses '14", and then moved inwardly seas. to-causethe projections 15 to pass throughthe cooperating recesses 14 and the bearing surface 17 to engage the bearing surface 13. Thlsi n- 12o ward movement of the arm is limited" j through the medium of the inclined surface 11*; After the arm has been moved fully inward it given a rotary movement to cause the projection 15 to be moved out of registry with the recesses 14 and to engage the steps 24 in which condition the arm is in operative position. 7 Thus lengthwise move ment of the arm in an outward direction is prevented by the projections 15" and inan 30 20 with a projection inward. direction by the inclined port-ion 18f, the arm being therefore securely locked n position. in this ca'sethe arm is journeied on the bearing surface 13 and inclined surface 11* during}; rotation in either direction.

Referring now to the form hi my invention disclosed in Figs. 7 and 8 the shaft 10" is provided at spaced intervals throughout its length with inwardly extending and 10 tapered sockets 12* and the sleeve 11 is formed with openings 11. opposite said sockets the walls of which or a portion thereof are arranged at the same angle the stalls of the registering socket to forinu continue- '15 (ion thereof. In this instance the inner ends of the rubble arms 16 are simply tapered as at 18f to fit into the openings li and sockets l2 as clearly illustrated in Fig. 7. To look the arms in position, each arm is provided adapted to enter a recess .14 formed in an extension'14 forming part of the 'sheft 10 undhuving its one end. closed as indicated at 145 to engage the projections 15' andliu it the rotary movement of the arms 16' in one direction, The projections 15" are located on that portion of the to ered end of arm which i'sof suiiicicnt y smell diizmeter to permit the projection to pussthrough the opening 11 so ftl1atthe use of recesses as'l i and 1.4is obvi Ll/3d. ltherwise this form of arm may he the same as in the two previous forms of my device To remove an arm of th s letter construction. it is simply rotated in a direc- 36 tion to remove the projection 15 from the recess 14: end then withdrawn. To replace" the. arm, the tapered end thereof is passed through the opening 11" and into the socket '12 with the projection 15 out of registry 4o -with the extension 14"., the inward movement of the arm being limited by the engagement of the inclined walls of the socket und opcning respectively with the tapered portion of the arm. After ftlie arm has been moved inward as far as possible it is given a partial rotation to bring the projection 15 into the recess 14 and against-the closed end thereof. In this condition the arm is in operative position and is held against outward length- Wise movement by the cooperation of the pro jection 15 and lateral wall of the recess 14?.

It is to he understood that in all the forms 1 of my invention the stops for limiting the rotary movement of each arm in one direction are so placed relatively to the HlCllIlw "-t on of the teeth or pro ections 23 that the pressure of thcore against these teeth as the furnace is in operation w ll be in a direction to lock the arms,'thet is to force the several leprojootiong against the cooperating stops and not away from their In all the forms of my invention the sleeve forms a fulcrum. as it were for the arms and the shaft or the sockets thereof a means for 5 retaining the arms against tilting downward and side strain. Each individuul arm may be instantly and quickly removed andt'as easily and quickly replaced or a n ew"arm substituted as desired. .Repa-irs may'thus be made without necessitating the shut-ting down of the furnace forenylonger peiic'd of time than it takes to effect an interchange of arms. The various fastening means While very simple are also extremely efficient and readily permit the expansion and contrac tion of the material of which the parts are made and due to difierences or variations in.

tei'npereture.

By constructing the rabble arms in such a manner that two spaced portions thereof only are in engagement with the walls of the apertures and. sockets, and the portion intermediate of said spacedportions is free from said wells and out of contact therewith, the cooperating engaging surfaces of the tubes and the rabble arms ureconsiderably reduced. The danger of the arms becomiz g stuck or clogged in the apertures and sockets is thus ohi'iated, as the frictional Contact between said art'lis and tubes is lieduced to a. minimum, without decreasing the cfiiciency of the structure} Various changes the difi'erent forms shown. and described may be made within the scope of the claims without departing from the spirit of my invention.

I claimz' 1. In an ore-roasting furnace, tvio upright tubes connected together and arranged tube, the arm between said bear ng surfaces being free from said tubes and lfestening means onseid arm for detachalfily engaging one of said tubes.

2. In-un orw'roastin furnace, two upright tubes connected together and arranged onev Within the other with an amiular space between them, one of said tubes being provided with an inwardly extending socket and the other" tube having an opening in re 'stry with said socket, one of said tubes eing further provided with a recess, a rabble arm extending through saidopening into said socket, a relatively narrow surface on said arm arranged to engage the inner surface bearing surface on said arm at a distance from the first arranged to engage the surfaceof said opening, the arm between said hearing surfaces being free from said socket-and of said socket, another relatively narrow" .and arranged to engage the outer tube, the

a projection on said arm arranged to pass through said recess and engage the inside face of one of said tubes.

, In an ore-roasting furnace two upright tubes connected together and arranged one within the other witlran annular space between them, each ofsaid tubes being provided with'aperturesin registry with each other, a rabble arm' extending through the aperture in one tube into the aperture of the other tube, a 'relatively narrow bearing surface on said rablilearm adjacent to its inner end arranged to engage-said inner tube, another relatively narrow btairinghsurtace on said rabble arm at a distance from the first.

arm hetweensaid bearingsurfaees being free from said tubes,-n1eans on said arm arranged to detaehably engage one o't' said tubes to prevent leugtlnvjs, movement of said arm in one direction and :u'lditional means on said arm arranged to engage ne of said tubes to prevent lengthwise movement. of the arm in the opposite direction.

4.. In an ore-roasting furnace, two upright.

tubes connected together and arranged one* within the other with an annular space between them, one of said tubes being provided with an inwardly tapered socket and the other tube having an openin in reg- .istry. therewith, a rabble arm .aving a.

tapered end portion extending through said opening-and into said socket, a bearing surface on said arm adjacent to the end of its tapered portion adapted to engage the inner surface of said socket, another. bearing surface on said arm at substantially the beginning of its tapered portion adapted to engage the surface of said opening, the tapered end portionof said arm between said bearing surfaces being free from the surface of said socket and fastening means on said arm for detaehably engaging one of said tubes.

In testimony whereof, I have hereunto set my hand in the presence of two subscribing 

